More Tractor Quotes

 Who: The Sixth Doctor (Colin Baker) Source: Doctor Who Spiral Scratch Note: The Doctor gives his life-force to save the multiverse and regenerates from injuries sustained in an attack on the TARDIS by the Rani that he overwise would have survived had he had the strength.

 Who: Sixth Doctor Source: Spiral Scratch (2005) Notes: The Doctor regenerated following an attack on his TARDIS by the Rani, being too weak from a recent adventure where he sacrificed his life energy to survive his injuries.